ISSN 2594-5327
58º Congresso anual — Vol. 58 , num. 1 (2003)
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Fatigue crack kinking and bifurcation are well-known phenomena capable of inducing significant growth retardation or even crack arrest. However, symmetrically bifurcated crack models available in the literature cannot account for the propagation behavior observed in practice. In this work, specialized Finite Element (FE) and life assessment software are used to predict the reduction in the propagation rates in asymmetrically bifurcated cracks. The crack path and the associated stress intensity factors (SIF) of asymmetrically bifurcated cracks are numerically obtained for several bifurcation angles. A companion life assessment program is used to estimate the number of delay cycles associated with crack bifurcation, allowing for a better understanding of the influence of crack deflection in the propagation life of structural components.
Fatigue crack kinking and bifurcation are well-known phenomena capable of inducing significant growth retardation or even crack arrest. However, symmetrically bifurcated crack models available in the literature cannot account for the propagation behavior observed in practice. In this work, specialized Finite Element (FE) and life assessment software are used to predict the reduction in the propagation rates in asymmetrically bifurcated cracks. The crack path and the associated stress intensity factors (SIF) of asymmetrically bifurcated cracks are numerically obtained for several bifurcation angles. A companion life assessment program is used to estimate the number of delay cycles associated with crack bifurcation, allowing for a better understanding of the influence of crack deflection in the propagation life of structural components.
Palavras-chave
fatigue, crack bifurcation, growth retardation
fatigue, crack bifurcation, growth retardation
Como citar
Miranda, Antonio Carlos de Oliveira; Meggiolaro, Marco Antonio; Castro, Jaime Tupiassú Pinho de; Martha, Luiz Fernando.
EVALUATION OF FATIGUE CRACK GROWTH RETARDATION AND ARREST IN BIFURCATED CRACKS,
p. 649-658.
In: 58º Congresso anual,
Rio de Janeiro, Brasil,
2003.
ISSN: 2594-5327, DOI 10.5151/2594-5327-2552
